TechErudio - Tutorial #13

Circuit Diagram

Part 1

To install the Python development stuff we need.

sudo apt-get install python-dev
sudo apt-get install python-pip 
sudo pip install RPi.GPIO

After starting the python interpretor, here are the commands to setup GPIO and light a single LED...

import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)
GPIO.output(4, True)
GPIO.output(4, False)

Part 2

Here are the stop light commands...

import time
GPIO.setup(17, GPIO.OUT)
GPIO.setup(22, GPIO.OUT)
while True :
	GPIO.output(22, True)
	time.sleep(5)
	GPIO.output(22, False)
	GPIO.output(17, True)
	time.sleep(2)
	GPIO.output(17, False)
	GPIO.output(4, True)
	time.sleep(5)
	GPIO.output(4, False)

CTRL-C to stop the while loop

Here is what should be in the rapidblink.py file...

import RPi.GPIO as GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)
GPIO.setup(17, GPIO.OUT)
GPIO.setup(22, GPIO.OUT)
import time
while True :
	GPIO.output(4, True)
	time.sleep(.1)
	GPIO.output(4, False)
	GPIO.output(17, True)
	time.sleep(.1)
	GPIO.output(17, False)
	GPIO.output(22, True)
	time.sleep(.1)
	GPIO.output(22, False)
	GPIO.output(17, True)
	time.sleep(.1)
	GPIO.output(17, False)

CTRL-C to stop the script

Here is what should be in the ledoff.py file...

import RPi.GPIO as GPIO
GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(4, GPIO.OUT)
GPIO.setup(17, GPIO.OUT)
GPIO.setup(22, GPIO.OUT)
GPIO.output(4, False)
GPIO.output(17, False)
GPIO.output(22, False)